FreeBSD 11.3 or 12.x on IBM 9115-505

[Mark Millard]

On 2019-Oct-24, at 16:23, Mark Linimon <linimon at lonesome.com> wrote:

> On Thu, Oct 24, 2019 at 12:11:41PM +0000, Phil Scarr via freebsd-ppc wrote:
>> I'm disappointed that TeamLinux is so much further ahead than TeamBSD
>> on this, but given the relative marketshare of each team, I can't say
>> I'm surprised.  :-(
> 
> It's more that there are not a lot of these machines are in private
> hands, compared to the older Macs and newer IBMs and especially the
> Taloses.  My tests with Debian showed problems when I tried it several
> years ago (just as a "does this box work" test).
> 
> AFAIK within FreeBSD we had a maximum of 3 people with IBM Power5s.
> 

I had a vague memory that C++'s investigation for its memory model
included power/powerpc and power5/5+ ended up special. Looking
around shows "ISO/IEC JTC1 SC22 WG21 N2745" was revised to say:

"Finally, applications that need to use C/C++ sequentially consistent atomic operations on Power 5/5+ must adhere to the rules set out separately."

with those rules being listed separately in:

http://www.rdrop.com/users/paulmck/scalability/paper/N2745rP5.2010.02.19a.html

Looks like power5/5+ was a bit of an odd ball compared to the
others.

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)